Hach-lange SC 1000 User Manual download pdf (Page 100)

Advanced Operations

6.3.3.6 Function set to PWM CONTROL/LINEAR working mode

Table 34 Color/line code for Figure 61

Error list

Warning list

Process event

Relay contact (SET TRANSFER=ENERGIZED)

Relay contact (SET TRANSFER=DE-ENERGIZED)

PWM CONTROL/LINEAR

SET FUNCTION

Default value: LINEAR

The 2nd SET FUNCTION menu sets the PWM signal status

LINEAR Signal is linearly dependent on the process value.

PID CONTROL Signal works as a PID controller.

SET TRANSFER

Default value: 0 seconds

Sets a substitute PWM ratio when some error conditions are detected in the selected source or if

the source is missing.

HIGH ALARM

Default value: 15

Sets the process value which leads the PWM ratio to 100 % (DUTY CYCLE set to DIRECT).

LOW ALARM

Default value: 5

Sets the process value which leads the PWM ratio to 0 % (DUTY CYCLE set to DIRECT).

PERIOD (0 s

–600 s)

Default value: 5 seconds

Sets the duration time of one PWM period.

MINIMUM

(0 %

–100 %)

Default value: 0 %

Lower limit of the operation range.

MAXIMUM

(0 %

–100 %)

Default value: 100 %

Upper limit of the operation range (Figure 62).

DUTY CYCLE

Default value: DIRECT

Sets the status of PWM ratio.

DIRECT PWM ratio rises with a rising process value.

REVERSE PWM ratio falls with a rising process value.

INPUT VALUE

Displays the process value read from the selected source after it has been processed by the

internal formula parser (if prompted).

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Hach-lange SC 1000 User Manual Page 100

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